Features:
- AMST 3003 dual display sports quartz digital watch for both men and women.
- Functions: Calendar, alarm, stopwatch, countdown, luminous, GMT.
- Imported Japan quartz movement, keep time precise.
- Dual display, digital and analog quartz movement.
- Calendar display, auto update calendar, need not to look at the calendar.
- Sapphire glass mirror, wear resistant and scratch resistant.
- Leather strap, soft and comfortable to wear.
- Stainless steel case and back cover, strong and sturdy in structure.
- Thread crown, more convenient to set time.
- A ferrule in the button for setting time, make a protection for it.
- Luminous pointers, easy to know the time without light.
- Pin buckle, convenient to adjust the length and not easy to fall off.
- 30M water resistant, especially suitable for outdoor sports use. Brand: AMST
People: Unisex table
Watch style: LED, Military, Outdoor Sports Shape of the dial: Round
Movement type: Double-movtz
Display type: Analog-Digital
Hour formats: 12/24 Hour
Case material: Stainless Steel Band material: Leather
Clasp type: Pin buckle Special features: 12/24 hours switch, Week, Alarm clock, Stopwatch, GMT, Calendar, Luminous, Date
Water resistance: 30 meters The dial thickness: 1.5 cm / 0.59 inches
The dial diameter: 4.5 cm / 1.77 inches
The band width: 2.2 cm / 0.87 inches
Wearable length: 19 - 23 cm / 7.48 - 9.06 inches
Array Package weight: 0.157 kg
Product size (L x W x H) : 25.5 x 5.3 x 1.5 cm / 10.02 x 2.08 x 0.59 inches
Package size (L x W x H): 27.5 x 7.3 x 3.5 cm / 10.81 x 2.87 x 1.38 inches Package contents: 1 x AMST 3003 Unisex Dual Display Military Quartz Digital Watch About Water-resistant Watches Water Resistant Watches are sealed to witstand some pressure.
Water resistance is tested in measurements of atmosphere (ATM). Each ATM denotes 10 meters of static water-pressure. This is not the depth to which a watch can be worn. Many watch cases will list the basic measurement of 1 ATM as "water-resistant." These watches will withstand small splashes of water but should not be worn while washing the hands or submerging the hands in water.
Remember, water resistance is tested under static conditions. Wearing a watch which is 50 metres water resistant in water will expose the watch to a much greater pressure than during a 50 metre static test. Therefore the number of metres shown on the watch does not indicate the depth that the watch can be taken to.
Here is a general guide
50M = 5ATM = Shower Proof - it's ok to get it wet a bit.
100M = 10ATM = Extended Water Exposure good for swimming or snorkeling.
200M = 20ATM = Pressure Resistant made for Scuba and Skin Diving.
Q: A 100M watch is surely strong enough on a shallow dive?!
A: No! It isn't because it has not been high pressure sealed. 100M watches are only good for Snorkeling!
Q: What will happen if I try to dive with a watch that is less than 200M Resistant?
A: The watch's seal will be broken, it will flood and break..irrepairably.
Q: So which watch to buy?
A: Think about what you need it for and bear in mind that Scuba Watches (200M) look really cool but tend to be very heavy, which makes them uncomfortable for everyday use. 
